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Margaret Lagorio [EH] From: Kelly Gillogly [kelly@sdcfresno.corn] Sent: Thursday, February 12, 2009 12:59 PM To: Margaret Lagorio [EH] Subject: Re: 5611 E. Waterloo Road, Stockton letter Margaret, Yes, the core barrel is 2.5 " in diameter. We will core out the bentonite and then tremmie the bore hole with one 941b bag portland cement to 6.5 gallons of water to within three feet of the surface. We will then use native soil to backfill to hole to within 4" of teh surface and match teh surface to the existing surface. kg Original Message From: "Margaret Lagorio [all" <MLagorio@sjcehd.com> To: "Kelly Gillogly" <kelly@sdcfresno.com > Sent: Wednesday, February 11, 2009 3:43 PM Subject: RE: 5611 E. Waterloo Road, Stockton letter Kelly, Are they going to remove the bentonite with a core barrel? The last 3 feet is to be filled with clean material (soil, cement). Margaret Original Message From: Kelly Gillogly [mailto:kelly@sdcfresno.com] Sent: Wednesday, February 11, 2009 12:37 PM To: Margaret Lagorio [EH] Subject: Re: 5611 E. Waterloo Road, Stockton letter Continuous coring with the Geoprobe to re-open the 2" hole. we will then tremie pipe the hole and use portland cement to grout it. Your letter stated grout would stop at 3 feet bgs. Did you want some other fill material from 3 feet to 0.5 feet from the surface? we are planning on being on site Wednesday the 18th. with an estimated start time of 10AM. Kelly 559-229-1451 Original Message From: "Margaret Lagorio [EH]" <MLagorio@sjcehd.com> To: "Kelly Gillogly" <kelly@sdcfresno.com> Sent: Tuesday, February 10, 2009 12:02 PM Subject: RE: 5611 E. Waterloo Road, Stockton letter Kelly, What is the method of coring? Yes, a tremie pipe should be used. Cement grout is 94 lbs. of Portland Cement to 6.5 gallons of water. Bentonite grout is per manufacturers specifications. Yes, we require 48 working hours notification so the grouting can be witnessed. 1